Drain assembly



Nov. 24, 1953 M. H. CHUDNOW DRAIN ASSEMBLY Filed June 26, 1950 INVENTOR. MORE/5 H CHUDNOW.

ATTOENEI? Patented Nov. 24, 1953 UNITED STATES OFFICE 3 Claims.

The present invention relates to improvements in drain structures for sinks, tubs, basins, or the like.

The invention has for its object to provide a new and simplified overflow pipe construction for drains of the above character. More specifically, it is an object of the invention to provide a novel valve assembly therefor.

The invention consists in providing an overflow pipe at its lower end with an external rubber ring having a circular cross section, which ring is capable of making sliding and, if desired, rolling contact with the walls of the enclosing pipes. This valve is simple to construct and easy to assemble, and represents a marked improvement over existing valve constructions.

A further object is to provide a valve construction for a waste which serves the dual function of valve and lock, the lock serving to retain the overflow pipe in raised position when desired. I

The invention will be better understood after reading the following detailed description taken in connection with the accompanying drawings, in which: 7

Fig. 1 is a vertical sectional view of a waste or drain constructed in accordance with my invention, showing the overflow pipe in the raised or draining position.

Fig. 2 is a front view of the overflow outlet.

, Fig. 3 is a view similar to Fig. 1, but showing the overflow pipe in lowered or stoppered position.

Fig. 4 is a fragmentary vertical sectional view of the valve detail of the drain showing the overflow pipe in draining position in full lines, and. in stoppered position in phantom lines.

Fig. 5 is a fragmentary vertical sectional view of the lower end of the overflow pipe showing a modification in the construction thereof. 1 Fig. 6 is a diagrammatic vertical sectional view of a waste or drain representing another embodiment of my invention and showing the overflow pipe in stoppered position.

Fig. '7 is a fragmentary view similar to Fig. 6, showing the overflow pipe in draining position.

Referring now to Fig. 1, there is represented by the numeral [0 a sink or basin to which my improved drain II has been applied. The sink is provided in its bottom with an opening [2 to which is connected a drain shoe or elbow l3, by means of a threaded ferrule I4 which is provided with a spider to which is connected a strainer 16 by means of screw ll. A gasket 18 is interposed between the shoev and the basin. This cutin Fig. 2.

2 let connection to the basin is conventional in. character, and may take any other well-known; form. I

A section of pipe 20 at one end threadedly en-- gages the free end of the shoe and at its other' end is connected by a slip joint union 2| to a waste and overflow T 22. T is connected with thewaste pipe Hi. The up-- per end of the T is connected by a slip joint union. 23 to the stand-pipe 24 which forms the outer" wall of the drain. The free end of standpip 24 is threaded into the lower end of another shoe: 25. The free end of shoe 25 is, in turn, connected to an opening 26 in the rear wall of the basin near the top thereof by means of an overflow plate 21 and screws 28 and 29. Gasket 30 is provided between the shoe 25 and the basin. to make the connection water tight.

The details of overflow plate 21 may be seen:

Circular openings and slotted opening 36 are provided therein. The openings are provided primarily as an outlet for the overflow from the basin, slot 36 serving additionally to permit the emergence of handle or operating: rod 31.

Operating rod 31 is provided at its external. end with a suitable knob 38, and threadedly engages with its other end a boss 39 provided at the upper end of overflow pipe 40. Overflow pipe 40 is provided at its lower end, which extends into T 22, with valve 45.

Referring now to Fig. 4, valve is seen to consist of an O-ring 40 having a circular crosssection which is mounted in an annular channel 41 in collar 48. Collar 48 is provided with an enlarged end 49 which fits over the end of overflow pipe 40. The collar may be attached to the overflow pipe by soldering, brazing, or in any other well known manner.

An alternative method of construction is shown in Fig. 5, wherein the end of the overflow pipe is provided with a pair of annular shoulders and 56, by spinning or by any other known process in order to provide the channel 51 for the. O-ring.

Operation of the drain will now be explained with the aid of Figs. 1 through 4. In Fig. l and in solid lines in Fig. 4, the overflow pipe is shown in draining position. It was raised by grasping knob 38 and lifting until further movement was prevented either by the top of pipe 40 abutting the inner wall of shoe 25 or by rod 31 reaching the upper extremity of slot 36. It is merely a matter of design choice as to which method of limiting travel is employed. In this position, the

The lower end of the liquid in the basin drains out through strainer l6, shoe l3, and pipe 20, into T 22, from which it exits to unobstructed waste pipe I9.

As can be clearly seen in Fig. 4, the upward travel of the overflow pipe is limited so that valve 45 does not completely obstruct the upper end of T 22. This clearance is provided to permit any liquid which has entered the space between the standpipe 24 and the overflow pipe 40 to drain out when'ithe pipeaidil sis;raised. WVhenit i'sidesired to stopper the *basin, rod 31 can beurged downward so as to lower pipe 40 into the position shown in Fig. 3, and in phantom lines in Fig. 4. In this position, the O-ring 46 contacts theinrrer cylindrical surface of the lower end of the T and creates a water-tight seal. It shoiild benoted that in lowering the overflow pipe, the -.O-,rin has been caused to roll from the lower edge of channel 41 to the upper edge thereof. 'lihis rolling action tends to redujce the resistance oiTered to operation of the drain and :more mportan tends {to-decrease the wear of the vQ-ring. The O-ring is preferably made of resilient material such :as rubber. If desired, ';the \wiolth'of channel 4. 1 rmay be :made equal to the Qrossesectional diameter 9f the id-ring, in which Tease, rolling action wvill be prevented. In normal use, {the presence of watfili, greaserand other cwasterm itter within'rthe' Telementwil p owidesuflici'e t lu cation toz-permit easeaof operation.

:It-:shou1;d :be p in ed t zat thi t e that th ris ip yided a smooth cylindrical bore extending over ithe entire length of travel (of ralvedfi. ilhe io-ring r45 .0verr.i.tseen ir periphery. makesfpoSitiikemntactiwith h walls fisaidbore except .ior por ions adjacentitheppening which leads to ithe rhorizorrtal :leg of the 'T when the ring is n d therewith. wherefore, there is substantial rsurface :contact zbetween the eating and the er abore when zthesoverfiow ipipe 58 :in its raised rp'osition, and :the :friction thereby created is adequate :to amaintainsthe .pipe iincsaid EeleVa-ted position.

iBy'ithe above 'arran'gement, git millzb'e obvious that the need for an independent latch arrangeinen-tito hold rtl'ie -bverflow pipe'zin its araised'or draining position thas been entirely {eliminated by providing waived5'whiehtperiorms ith'at function *in fiad'dition ito icontrolling the waste a'fi'ow.

5in ith'e :st'op'pered iposition :as :shown in rliig. 53, the liquid rises in the space betweenthe'istandpipe hla andtheioverflo-w :piperfl'iL-seeking the ilevel o'i the' fiuid inithe basin. If the liquid should rise abovethe upperrend fiil I of the overiiow' pipe, itwilboveriiow through theoutlet 2 1 and through the center of :pipe 46 to the waste pipe l'l, as shown by arrow'b I.

"The modifica-ti'on shownin Fig. 5 o'perates in the samemanner as the' aboveobut maybeipreferre'd from-a manufacturingstandpoint. In both forms, the 1 annular-shoulders forming the chan- ;nel-fo'r ftheo ring-are' constructed so :asito fit loosely-within athe bore lot the '1'.

iNowtrferringi-to Figsssfii'and 7, :Iihave shown diagrammatically another form of my invention.

in thisuembodiment, \thelwaste ils shown :as :havingzbeen y'designed fonconnectioni'to thehorizontal flange .orsshelf *ro'f :the basin ,rather 'gthan'ito :the rearqwall thereof. As:shown,ethestandeniperrnay be wthreaded at :its *upper :end and connected st-o the-:basintflange 65 by-aneans f @nuts fifiandefil. Their-lower end-pixthe; standpine i rconnectedio 1a trzwhich: in turn .ismonnectedito athe -rbottcm of theibasineand to the waste nipeiinitheesame vmanneriasashowniin .Eig. 1. its :seen figs-16 ,fi,ange-. on the knob rests on nut 61.

and 7, the lower end of the T is provided with two annular shoulders 68 and 69, between which rides an O-ring 10 similar to O-ring 46 in the previous embodiment. Fitting snugly within the O-ring 10 is the overflow pipe H, which is provided with a plurality of slotted openings 12 at its lower end and an opening 13 at its upper end. The upper end of pipe H is provided with a knob 15 above the sink by means of which the operator can raise .iand'lower theoyerflow pipe.

As seen in Fig. 6, the --overflow pipe 'is in the stoppered position. In this position, the pipe has been lowered by means of knob 15 until the H As can be seen, O-ring 10 rests against lowermost shoulder qieand openings 12 in pipe H lie below ring 10. .wasteliquidscannot pass beyond the O-ring and, therefore, rise in the basin as well as within the :sp'ace between pipe H and the stand-pipe. In this modification, opening 13 acts as the overn w outl t, p rmitting the u d reach t ins d o :nin 41 and e t qus t bottom thereof to the waste pipe.

17 orde t Q enrt a n t e pip -ll i is yzerasp naknob 1.5- Ba s ne th r p ea s t ,O-jring to roll down the body .ofl the pipe while at the tim o lin D t e w l io th T until it abuts shoulder 58.

albef7 hows the Q flQ min in the .dra n position in which openings -12 are "now .above o-ring and, the ore. o id a outlet for the Efluid surround n th min Passage Q wasteliqui s is hown shy th row in $111 modifica ion. h a Q 10 t e ar n is shown as vsu-lostanliially (entirely rolling with --a minimum of :sliding. It '.=should zbe obvious :that the shoulders fiil and'ifi lcan be place'dacloser -;-together- -in :orderzto restrain the rolling action and provide a sliding *valve arrangement. In either case, I there is suficient resistance "to motion provided by the 0-ring valve to maintain the overflow pipe in -'elevated;position for-draining. The rolling arrangement-forthe ring is usually prefer able because of reduced wearof Y the ring'.

I desire it to be understood that although "'I have shown and describe'd "my invention in connection with eific embo me ts. i .is n 2 be limited thereto for it may be modified in various ways. v.Flor example, .the valve 345- on the verflow pip in fiss- 11 through ay be placedb itheva ve st u tu e-s own inffissgfi an 7, while the latter valve structure may be replaced bywalveJlE.

{ll-he. overflow plate 2 1,-.as well -as'the. openings thereinias shown in.Ei g. 2 may take various configurations. in the construction ishown in -.Figs. Land ii th o eratinelever fifl maybe lengthened wa :t ae tendthr ush pip 4 [to the npnoys te wall hereofat. rebv:presidi ;incr asedri idity. Other altera ons will appear obvious ito :those skilleddnthe art.

l -Wi1 b s en ha .1 have --;provided .a drain which is efiicient ioperation, :SimDle to c on; struct, andl asa;minimumof-parts. I

Hav n now' ele ibed my invent on in detail, rb LE EQ 'S' Patent and clairnz -1. ;A;waste ofthe character described-comprisng a ,waste a-ndeoverfiow :T' having ;an upper, ;a l e 2. 1 a h izon al s; s nd-pipe con- Q QEQ MZ z a di lpper leg; an overflow ip pe -pqsi- ,tien l in-said zs andepip or axialimovement the em. the lowerend era-said DVGrfiQWQPiPeJeX- ten ins. nto said "I; and valve zemeanslconnected betweeneand iinzyieldingacontaet'lrwith .saidover flow pipe and with the inner walls 01' said T for selectively sealing and unsealing the lower leg of said T, said valve means comprising a resilient O-ring positioned about the overflow pipe near its lower end to maintain said contact with both said overflow pipe and said walls of the T for all positions of said overflow pipe, and movable to seal off slotted drain openings in the lower end of the overflow pipe, from said horizontal leg, when the overflow pipe has been moved to its lowered position and means spaced along the walls of the lower leg of said T for limiting the axial movement of said O-ring relative thereto.

2. A waste as set forth in claim 1 wherein said last named means comprises a smooth cylindrical bore extending between a pair of spaced annular shoulders located in said lower leg of the T whereby the rolling movement of said O-ring is constrained within limits.

3. In a drain assembly wherein an axially movable overflow pipe is positioned within a standpipe, its lower end extending into a drain and overflow T, the latter being connected to said stand-pipe, said T having an upper, a lower, and a horizontal leg, a valve arrangement for selectively sealing and unsealing the lower leg of said T,

' said valve arrangement comprising a smooth annular cylindrical recess along a portion of the passage below the mouth of the lower leg of said T, said smooth recess being of greater diameter than that of said lower leg, at least a portion of said overflow pipe at the lower end thereof being smooth, cylindrical, concentric with and spaced from the wall of said smooth recess, a resilient O-ring rollingly embracing said overflow pipe within the limits of said smooth portion, said O- ring having a circular cross-section, the diameter of which is greater than the concentric space between said smooth portion of the overflow pipe and the cylindrical wall of the recess in the drain T, the wall of the overflow pipe being provided with slotted holes therethrough, said slotted holes being spaced upwardly from the bottom end of said overflow pipe, the arrangement of said assembly being such that when the overflow pipe is in the upward position, said slotted holes provide communication between the horizontal leg of the T and the inside of the overflow pipe; and when the pipe is in the lowered position the O- ring seals off the slotted holes from the horizontal leg.

MORRIS H. CHUDNOW.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 80,066 Gibson July 21, 1868 FOREIGN PATENTS Number Country Date 5,521 Great Britain of 1888 615,974 Great Britain Jan. 14, 1949 

